Finding the Fourth Proportional to 9,955.38, 13,737.90 and 5,478.27

Step by Step Solution

1. Step 1: Write the proportion equation
   9,955.38 : 13,737.90 = 5,478.27 : x
2. Step 2: Convert to fraction form
   9,955.38/13,737.90 = 5,478.27/x
3. Step 3: Cross multiply
   9,955.38x = 13,737.90 × 5,478.27
4. Step 4: Simplify right side
   9,955.38x = 75,259,925.43
5. Step 5: Solve for x
   x = 75,259,925.43/9,955.38
6. Step 6: Final answer
   x = 7,559.72